I have an older MF 12 (coil and points) that has ran for 2 years and will not this spring.
Starts excellent but when you let go of the key (releasing back to "on") it dies.
The wiring setup that worked and no longer does is the following...(I realize being 50 years old this might not be "factory" however it did work up to now)
The key switch has 3 spades but there are no labels....if they did exist rust has removed them.
One spade goes to the hot large post on the solenoid (same one as positive battery cable)
One spade has two wires on it with one going to a small post on the solenoid (solenoid has two small/two large posts) and other wire going to positive post on coil.
Third post has no wires hooked to it.
Any ideas....as this setup was how I purchased tractor and it ran the last two years.
It appears to kill spark when releasing from start to on.....does this mean bad switch?
I bought a new switch but it is 5 post and I am not sure how to wire it as the current switch only used two posts.